摘要
为了明确水平井钻遇储层的物性差异对非均质油藏水平段内产能动用规律的影响,本文以M断块高孔渗底水油藏为例,通过建立水平井井筒内流动非线性方程,求解了非均质油藏水平段内产量分布及压力分布规律;同时结合Eclipse数值模拟软件多段井模块Multi-Segment Well Model监测水平井不同水平位置、不同计算时间的流量、压力等指标。方程求解和数模论证结果印证了本断块水平井存在水平井段生产端产量大、末段产量小的分布特征,水平段内压力从水平井的末端至生产端是逐渐减小的。现场实践表明,分段开采可以有效改善因储层非均质性导致的水平井动用效果差问题,该研究对于同类长水平段非均质储层的开发具有一定的指导意义。
In order to find out the influence of the physical property differences during the drilling of horizontal wellon liquid production and pressure in the development of heterogeneous reservoir,the paper has solved the distributionof licjuid production and pressure of heterogeneous reservoir through establishing the nonlinear equation of wellboreflow in horizontal wells by taking M bottom water reservoir with high porosity and permeability as an example.In addition,the paper has used multi-segment well model of Eclipse software,which can monitor the liquid production and pressure at different horizontal positions of horizontal well with different calculation time.The two methods confirmed that the horizontal well section has large production in end segment than front segment,pressure from the end segment to the production end is gradually reduced.In view of the poor development effect of horizontal wells causes by large heterogeneity,subsection development has adopted.According to field experiments,subsection development can effectively improve the poor difference production caused by reservoir heterogeneity.The study has certain guiding significance for the development of similar heterogeneous reservoirs developed by horizontal well.
作者
周春香
Zhou Chunxiang(Research Institute of Exploration and Development of Dagang O ilfield Company,CNPC,Tianjin 30020,China)
出处
《非常规油气》
2017年第6期59-63,共5页
Unconventional Oil & Gas
基金
中国石油天然气股份有限公司重大科技专项"复杂油气层综合评价技术研究"(2014E-06)资助
关键词
水平井
井筒流动
井筒流量
多段井模型
分段开采
horizontal well
wellbore flowing
wellbore liquid production
multi-segment well model
subsection development
